Piersen



E. H. PIERSEN.- TELEGRAPH TnANsmlT'ER.-

APPLICATION FILED' EEB. 9, 191?- r15 s'HEErs-SHEE! 1.

RQiSSued July 6 NS www SMQ R m 0 .c

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TELEGBAPH TRANSMITTER. APPLICATION FILED FEB. 9.`I911.

14,910. l5 SHEETS- SHEET 3.

Reissued July 6, 1920,

E. H. PIERSEN.

lTELEGRAFH TRANSMITTER.

APPLICATION FILED FEB. 9, IeII.

15 SHEEISAIIEI 4.

eissued 111556,' 1920.

fawn/mwen Byk R. QS QS@ v E. H. PIERSEN.

TELEGRAPH TRANSMITTER..

APPLICATION FILE-D FEB. $11 |917.

Reissued July 6, 1920.

h* y I uw E.. H. PIYERSAVEN. TELEGRAPH TRANSMITTER. AAPPLICATION FILED FEB. 9| l|91?.

14,910. 15 sHcErswsHEEr s.

Reissue; July 6, 1920.

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E. H. PIERSEN. TELEQRAPH 4TRANsn/HTTER. APPLICATION FILED FFTB.9|1917.

Rlssued July 6, 1920.

A 7 rop/VE Y E. II.. PIEITSEN -TEL'EGITAPH TRANSMITTER. APPLICATION FILED FEIT. 9. 1917*..

14,910. -I5SHEEfS-SHE-EI l0.

Reissued July 6, V1920.

l) /NVE/VTQR 4 i 32' fdw/b/P/ersn.

E. H. PIERSEN.

TELEGRAPH TRA-NsMnTER.' APPLlcATIoN FILED rE.9,1'917.

15 SHEETS-SHEEI 1l.

Reissued July 6; 192.0.

' n Tram/EY E. H. PIERSEN. T ELEGRAEH TRANSMITTER.

A T TURA/Ey Reissue@ July 6, 1920.

E. H.. PIERSEKN. v TELEGRAPH TRANSMITTER. API-LICATIDN FILED FEB. 9.1917.

15 SHEETS-SHEE H- A /N VEA/TUR A7' TOR/MEX UNITED STATES PATENT OFFICE.'-

`EIDNIIIN H. PIERSEN, 0F '.LJEEKA,v KANSAS, lASSIGrNOB-l T0 THE PIERSEN TELEGRAPI-I TRANSMITTER COMPANY, OF TOPEKA, KANSAS, A CORPORATION 0F KANSAS.

armsteun-TRANSMITTER..

Specification of Reissued Letters Patent. RQiSsued July 6, 1920,

Original No. 1,157,040, dated October 19, 1915, Serial No. 737,239, led December 17, 1912. Application for reissue led February 9, 1917. Serial' No. 147,709.

To all whom t may concern.'

Be it known that I, EDWIN H. PinRsnN, a citizen of the United States, residing at Topeka, inthe county of Shawnee and State of Kansas, have invented certain new and useful Improvements in Telegraph-Transmitters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to telegraph transmitters, and more particularly to one of that class utilizing a keyboard for releasing character forming members to the actionbf a motor and into operative relation with a circuit making and breaking mechanism,

vwhereby impulses corresponding to those produced by an ordinary telegraph key are created.

`It is the principal object ofthe present inventionto produce a machine of this type wherein devices indicative of telegraphic characters may be accumulated in storagev and effect driving connection of character members with a suitable motor in proper sequence to operate a circuit making and breaking device as a key at sending speed irrespectiveof the speed or regularity of operation of the keyboard, thereby obviat' ing 'confusion of the symbols or the necessity for special training of an operator. In

accomplishing this object, I provide al storage element comprising an accumulating drum or cylinder having a plurality of trip members for each character sendable by the I 40 machine, and a single character member for each set of trips.. A transmitting element,

movable independently of the storagel e'lement comprises character members individually'mounted in a frame, which is. in'

dependent of, but adapted for actuation from the drum driving mechanism, the connections being such-that rotative tension from saiddriving mechanism will tend to move the drum and frame in opposite direc-` tions, with the result that while the character frame is always advanced with the accumulating drum it always returns `to its initial position, and during its return travel wipes the active trips inthe drum to release i in the transmitting element are in reality set` bv the dogs in the storage or setting .element,-I refer to them as positioning devices in order to avoid confusion in terms. For the same reason I refer to the key levers and '.their connected parts as selecting levers or mechanism.

It is also an object of the invention to provide improved details of lstructure for accomplishing thegeneral object above mentioned, the preferred Aforms of which are illustrated in the accompanying drawings, wherein Figure I is a side elevation of a telegraph transmitter constructed according to my invention, the case being in section.

Fig.A II is an elevation of the opposite side of the same. y

Fig. III is a longitudinal section of the same. i

. Fig. IVis an elevation on the line IV,- IV, Fig. I, the case and drum being in vertical section.

Fig. V is a rear perspective view of the frame and keyboard levers.

Fig.'VI is a side elevation of the transmitting element.

A.Figa VII a front view of same.

side of the device. Fig. IX is a rear view of the device. l Fig. X is a section on` the line X-X, Fig. II, showing the visible, audible and touch indicators and keyboard lock.

Fig. VIII is an elevation of the opposite Fig. XI is a perspectiveview of a device for uniformly varying the touch of the keyboard. Y Fig. XII is a perspective view of parts of 5 the cylinder escapement and erase pawl.

Fig. XIII 'is a perspective view of the keyboard indicator finger and-carriage.

Fig. XIV is a. perspective view vof a por` tion of one of the key levers, illustrating its method of mounting.

Fig. XV is a perspective view of one side of the spacer bar lever showing its mount-l Fig. XIX is a sectional view otone of the.

character members and itsmounting.

Fig. XX is an enlarged perspective view ofy a portion ot' the lower part of the transmitting element, viewed from the inside.

Fig. XXI is a perspective view'ot the stop lever for vcontrolling the character member.

Fig. XXII is a perspective view olfv a gear for operating the transmitting element.

Fig. XXIII is a similar 'view of the opposite side of said gear.

Fig. XXIV is a perspective view of one of the character members.

Fig. XXV is a diagrammatic view ofolle of the character members showing the relative position of character member and brush 40 when the latch is about to trip.

Fig. XXVI is a similar view of the same parts after the latch has tripped, showing how the character member is automatically brought into proper relation to the brush t0 correct the spacing between characters.

Fig. XXVII is a perspective view of theword space character member.

Fig. XXVIII is adetail view of the vgovernor and its setting mechanism.

Fig. XXIX is a detail vview of a cam for actuating the governor setting mechamsm.

Fig. XXX is a sectional view of the. ine' dicator `on the' line XXX-XXX,

XXXI.

Fig. XXXI is a perspective. View of the speed indicator. Y Fig. XXXII is a detail view of the 'indi- 'cator quadrant.

Fig.y XXXIII is a detail view of the indicator spring. e

Fig. XXXIVis a perspective view of one of the indicator sheaves and the device for locating the home position of the transmitting element.

,fronti part of the machine case, showing the mounting of the hand key.

Fig. XL is a perspective view of the crank cup and pawl for winding the spring motor. y l

Fig. XLI is a vertical se ytion on the line XLI-XLI, Fig.`XLII.

Fig.` XLII is a sectional view through the casing, showing the ratchet crank and wind ing'pinion.

Fig. XLIII is an outside perspective view of the circuit closer.

Fig. XLIV is an inside perspective view ofsamc.

Fig. XLV is a perspective view of the collector rings and theframe wiper, forming part of the circuit closer.

Fig. XLVI is a section on the line XLVI-XLVI. Fig. XLV, showing the insulation for the collector rings.

'Fig XLVII is a detail perspectiveview of one of the dogs in thestorage drum.

Fig. YXLVIII is a similar view of the opposite side of same. v `Fig. XLIX is a detail perspective view (if the spring latch for theabove named c og. l

Fig. L is a sectional view on the line L-L, showing the relation between the spring latch and dog. l Fig. LI is a side elevation of one of the dogs and its key lever, illustrating the action of those parts.

Fig. LII is a perspective view of the latch board for insuring single actuation of the keyv levers. p

Referring more in detail to the parts:

1 designates a frame wherein the storage 115 drum, transmitting element, keyboard, and other operative parts of the, machine, are mounted, being preferably provided with rubber feet 2 for cushioning its supportr and deadening the sound of the machine, and 120 with rearwardly extending lugs 3 to which the ears 4 of a cover 5 are pivotally mount-l ed. The cover 5 covers the frame l andthe parts contained therein, and has forwardly extending side portions 6 adapted for iis/'1125.

closing the keyboard, the inclined top being preferably provided with a copy holder 7. The rear of the cover is provided'with suitable apertures for receiving the binding posts 8 9, the Jformer of which is ground- 130v ed on the case and the latter insulated .l circuit through the parts of themachine,

as willv presently be described.

In .order to hold the. cover in place, I' pro vide same with latches 1() (Figs. IV and XXV) comprising a-cup 11 which is threaded into the cover from the inside and has an aperture 12 through which aplunger l13 is4 slidably projected, the inner end of the plunger being adapted to-.seat within a socket 14 in the stationary frame 1 and normally held in its holdingposition by a coil spring 15 which bears against the base of' the cup 11 and against a shoulder 16 on the plunger, the outer end of theplunger being provided with a knob 17 by which it may be drawn outwardly against the tension vof the spring to break the connection with the frame when the cover is to be tipped back.

Tiansf/nitng element.

. J ournaled in hubs 18 and 19 (Fig. IV), on frame 1, are tubular gudgeons 20 and 21, which project axiall from the transmitting element frame 22 *igs VI and IX), Comprising'skeleton end members 23 and 24 on which the gudgeonsare fixed and tie rods 25 and 2G and bars 27 and 28 which unite the end members to form a rigid frame. bar 27 is seated within offsets in the rear of the nend members 23 and 24 and provided with slots 29. y

Pivotally mounted on a shaft 30, which is fixed in the end members 23 and 24, and eX- tending through the lower portion of the 'bar 27, are bell crank levers 31 corresponding in number with the transmitting element comprised by the machine.

The upper arm of each bell crank lever eX- tends upwardly and forwardly past the center of the storage drum within which the transmitting element is mounted vand near its end is offset and provided with a lamina 31 (Fig. XIX) which is spread from the body'. of the lever to form a pocket for containing the character member 32, presently described, and at its end is a downwardly vfacing shoulder33 and upwardly facing hook 34. The lower arm of the lever is pointed and slidably mounted in slots 35 (Fig. XX) in the plate 36 of a slide 37, the

ends of which project through apertures in the end members 23 and 24.

Uharacter member.

Each4 character member' 32 is revolubly mounted within the pocket in its bell crank lever by means of a pin 38, and comprises a gear wheel 39 (Fig. XXIV) the teeth of which are preferably pointed in order to lt readily into a driving pinion by which it isactuated.

()n the side of the 'gear wheel is a symbol ring 40 having teeth 41 on its periphery, of

The

vfaces upon which the brush teeth may ride to provide smooth and easy action.

Each symbol ring 40 is `provided with a 30 plurality of sets of teeth 41, the number of sets being determined by the space vrequired for the various dot and ldash teeth. The inner periphery ofthe ring has a point 42 for each set of character teeth, Aarranged to stopor set the character member in proper relation to its releasing device, and the gear wheel 39 has a plate 43 fixed on its face within the ring 40 and lprovided with notches 44 corresponding in number andar- 90 rangement with the v.points 42, and adapted for coperation with said pointsto set the character member. v

The bar 28 at the front of the frame' 22 is arranged beneath Aears 45 on the frame 22 95 and provided with slots 4G.

Pivotally mounted on a shaft, 4T, carried by the ear's 45, and the bar 28, are .the latch levers 49' which correspond in number and'- arrangement with each. of the bell crank levers and character members. Each leier" 49 has an:arm 50 yieldingly held agaiiist `the shoulder 33 of the bell crank lever a spring 51 the one' end of which is carrled bythe hook 34 on the end of the bell crank 105' 31 and the other by a hook 52 at thepoint of the lever 49; the second arm 53 off/the latch lever being projected past the side of the character member and provided with an inturned lip 54 (Fig. XXI) adapted for 110 `end 54 of arm 53 and trip the arm 50 and release the character member from its driv" ing mechanism. As the end 54is moved into'l: l the notch 44 of .the plate 43 by the releasing' -125 action, it first contacts theinclined surface 44 thereof andwturns the character member until the end 54 ultimately rests against straight face 44 of the notch 44. The object of this mechanism is to correct and equalize the spacing between characters because, owing to the fact that it 1s impossible to divide the characters of a telegraph code equally on the peripheries of disks or rings of the same diameter I prefer to form each character in its proper length` and allow the resulting variation to enter inthe spaces between the characters onthe disk or ring, so that it can be mechanically corrected as described. It is apparent that the relative positions of the point 42, arm 53 and notch 44 are such that `the distance'of the point at which the end 54 contacts with the inclined surface 44 immediately after being tripped by point-l2, from the point at which the end 54 finally rests against the straightface44 is equal-to the'amount of correction necessary to move the character member sufficient to produce equally spaced characters As tliecontacting area ot' the latch and `bell crank levers is small, I provide a guide for holding both parts in position, comprising a plate 5G at the front of the trame having'a slot 57 foreach pair of levers and within which said levers may operate freely but 1n proper relat1on.

Ullash gear.

Revolubly mounted in and extending between the end member-s 23 and 24 at the top of the trame is a shaft 5S having a gear wheel 59 rigidly fixed to one of'its 'ends and meshing with a gear wheel 6U revolubly mounted on a stub sha ft G1 on the end member 24.

Revolubly mounted onshaft 5S is a sleeve 62, the ends of which carry bell crank hangers G3, the lower arms of which project over and adjacent to the plane of the character members and carry an elongated revoluble pinion 64; the upper ends of the hangers being adapted for abutment against the tie i rod 25 to hold the pinion out of engagement with the gear wheels of the various character members when the latter are in idle position, a spring 65" being connected with the lower end of one of thelevers and with the end member 24 in order to vieldiugly tension the pinion 'toward the character members and retain the upper ends of the hangers against the tie rod to insure proper meshing of the character member gear teeth with the pinion.

l Sending speed governor.

Rigidly connected with the pinion G4 is a gear wheel (5G which meshes with a gear is revolubly mounted in point bearings/T2 and 73 carried bythe end member 24, and l an arm 74 depending from the tie rod 25 respectively. :The gear wheel 71 meshes with a pinion .7 5 forming part of the goverrame -ment frame is controllable by a governor which is mounted on the governor shaft 79.'

The governor which. I show, and prefer to use comprises 'wings 80 which are rigidly secured on lthe shaft T9 and to Which the weights 8l are pivotally connected, the weights in turn being yieldingly held in collapsed relation bysprings 82, and provided'with rollers 83 which are adapted to bear against a disk 84 that is slidably'mounted on shaft T9, when the governor weights are expanded to move the disk along said shaft. v

Slidably mounted inA arm 78, and' in an arm 85, also depending from the tie rod 25, is a rod 86 having a leather, or like friction inducing tip 87 adapted for contact by the disk S4 and provided with a spring. 88 which bears against the arm S5 and against a collar 89 on said rod to yieldingly tension same toward the governor disk, the spring being sutiiciently strong to hold the governor' against the tension of the spring motor by which the device is actuated. and lock the machine. v

To release the goijernor1 provide a lever 90, which `is pivotally mounted on the end member 23 by a pin 95. one arm of the lever having a yoke 91 straddling the rod `8G and adapted tobear against a collar 92 slidably mountedon said rod and bearing against a cushioning spring 93 which surrounds thc rod and Ibears against a fixed head 94 on the outer end thereof, the lower end of said lever being extended past the inner end of the gudgeon 2() and adapted `for engagement by a pin 9G which is slidably mounted therein. The end of the pin terminates adjacent the cover 5 and is adapted for engagement by a setting cam however, that by extending the pin 96 through the gudgeon, on which both the transmitting .element -frame `and storage drum are mounted, the governor contained within and 'at one side of the center of the cylinder may be controlled b v the apparatus on the exterior of the casing. so that it is unnecessary to uncover the working parts, or have access to the character mechanism, in` order to secure such regulation.

Circuit closer.

In order to limit the speed of the governor, I also provide the end of thev transmitting element frame with a set screw 98, the end of which is adapted for engagement by the head of the rod 86 when the latter is moved outwardly, toilimit the space between the end 'of the lrod and the govj ernor disk and thereby limit the speed of the machine, it being apparent that the screw .will positively4 stop the travel of the .rod when engaged thereby, and that should an operator endeavor to increase the speed by 4 manipulation of the first mentioned regyXLIV and XLV.) w ich is pivotally mount- ,ed in point bearings 100 in the end members 23 and 24 and has a longitudinal groove within which the split brush 101 is mounted,

' 4the brush comprising flexible leaves, each having a down-turned free end adapted for 'engagement with the teeth on one'of the character numbers; the bar having a lip' 102 for each brush leaf, through which a set screw 103 is projected to contact the leaf' and adjust the same to secure the proper cooperation with the character member.

Fixed to one end of. bar 99 is a leverA 104 havingga lower arm 105 provided with a spring 106, the rear end of which is con- `nected'with the hook 107 (Fig. VIII) on the inner end of al pin 108 which extends through the cross -bar 27 and has a thumb nut 109 threaded thereon-to adjust the vten sion ofthe spring and control the touch of the circuit closer.

' The upper arm 1,10 of lever 104 has a laterally turned tip provided with a depending boss 111, of rubber, or other insulating material, which overlies the horizontal arm 112 of a rocker 112, which is pivotally lmounted between point bearings 114 that project through the sides of a U-shaped bracket 115 which is rigidly mounted on an insulatingbase 115 on the transmitting element frame, so that the bracket and the bars connected therewith are insulated from the frame, the upper end of the rocker having a point 116 adapted for contact with a point 117 on a screw- 118 which is carried by a web of the'end member 23, the horizontal vmember of the rocker being provided with a spring 119 which is hung from' a screw 120 on an upstanding arm 121 of the U-bracket 115 and is adjustable by a thumb nut 1 22 to vary the tension of the rockertoward its contact member.

Extending laterally from the U-bracket.

115 are ears .123 which carry a pin 124, and pivotally mounted on said pin is an arm 125 which is yieldingly tensioned outwardl by a spring y126 and carries va brush 127 which is adapted to wipe the inner ring fiber or like insulating washers 129 4carried by the spider webs of the storage drum, and

j' will presently be -more fully described.

It isapparent that when the character members are released and actuated by the elongated pinion 64 to rock the brush bar, the lever 104 will rise and.fall from the rocker 112, making andvbreaking contact between the rocker and the 4point 117- on 4the A 128 of a current collector which is fixed to i transmitting element frame, so that with a circuit wiregro'unded onA the frame an electric vcircuit isl closed and opened therethrough, through the rocker bracket and. brush to the collector ring, as the rocker contacts and separates fromthe point, the insulated mounting for the bracket preventing grounding of the other circuit wire which leads to the collector ring 128'.

Character maout-elima'naton/-frcpea vThe storage drum, within which the transmitting element frame is contained, has setting-devices pivotally mounted in its circumference and adapted for projection into 'the interior, as will presently be described in detail. Each of the setting devices, however,

' is*adapted,`when rocked into active position,

upper end of the lever and hold same until 'the character has been completed. In order to positively lock'the bell crank .lever and setting devices together until the character nism comprising a Alatch bar 130 which ex-l tends entirely across the`transmitting'element frame and is pivotally mounted on 'a l rod 131 carried lby bearings 132 that project levers will lie directly back of the tongues.

Pivotally mounted on the end members 23 and 24 of the transmitting element frame are hangers 136 which are connected by a cross member -137 that `is adapted to overlie the' vlower ends of all of the bell crank levers 31, each of the hangers having an inturned stud 138 lying back of the adjacent ear 133 of the cross bar 130 so that when the hangers`136 are tipped upwardly by the engagement of any of the bell crank leversl31 -with the cross member137, the studs will engage the rear edges of said ears and `tip the cross bar 130 downwardly so that the proper tongues thereon will engage the trip 'onthe storage drum which has rocked the Fhas been completed, I provide a latch mecha'- 

